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Qin Wu (sunseawq@huawei) Dhruv Dhody( dhruv.dhody@huawei )

Extensions to Path Computation Element Communication Protocol (PCEP) for handling Link Bandwidth Utilization draft-wu-pce-pcep-link-bw-utilization-00. Qin Wu (sunseawq@huawei.com) Dhruv Dhody( dhruv.dhody@huawei.com ) Stefano Previdi ( sprevidi@cisco.com ).

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Qin Wu (sunseawq@huawei) Dhruv Dhody( dhruv.dhody@huawei )

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  1. Extensions to Path Computation Element Communication Protocol (PCEP) for handling Link Bandwidth Utilization draft-wu-pce-pcep-link-bw-utilization-00 Qin Wu (sunseawq@huawei.com) Dhruv Dhody(dhruv.dhody@huawei.com ) Stefano Previdi (sprevidi@cisco.com ) PCE IETF 88 Vancouver

  2. PCEP extension for handling Link Bandwidth Utilization • Objective • Extensions to PCEP [RFC5440] to consider ‘Link Bandwidth Utilization’ as new constraints during path computation • Motivation • Traffic Engineering Database (TED) as populated by IGP contains Maximum bandwidth, Maximum reservable bandwidth and Unreserved bandwidth ([RFC3630] and [RFC3784]),Residual bandwidth and Available bandwidth ([OSPF-TE-EXPRESS] and [ISIS-TE-EXPRESS]),Utilized Bandwidth ([ISIS-TE-EXPRESS]). • Real time link bandwidth utilization is becoming critical in the path computation in some networks • RSVP and non-RSVP traffic • It is important that link bandwidth utilization is factored in during path computation. • PCC can request a PCE to provide a path such that it selects under-utilized links. • The links in the path MAY be monitored for changes in the link bandwidth utilization • re-optimization of such path MAY be further requested PCE IETF 88 Vancouver

  3. Terms Introduction PCE IETF 88 Vancouver

  4. Extension to PCEP • BU (Bandwidth Utilization)Object • New Objective Functions PCE IETF 88 Vancouver

  5. The PCReq/PCRep Message • PCRep Message Format: • PCReq Message Format: PCE IETF 88 Vancouver

  6. Next Step • Request for adoption as a new work item. PCE IETF 88 Vancouver

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